EP2047947A1 - Werkzeughaltendes Getriebe für Maschinenwerkzeuge - Google Patents

Werkzeughaltendes Getriebe für Maschinenwerkzeuge Download PDF

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Publication number
EP2047947A1
EP2047947A1 EP07425638A EP07425638A EP2047947A1 EP 2047947 A1 EP2047947 A1 EP 2047947A1 EP 07425638 A EP07425638 A EP 07425638A EP 07425638 A EP07425638 A EP 07425638A EP 2047947 A1 EP2047947 A1 EP 2047947A1
Authority
EP
European Patent Office
Prior art keywords
tool
gearbox
holding
box
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07425638A
Other languages
English (en)
French (fr)
Inventor
Pier Domenico Bronzino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARIO PINTO SpA
Original Assignee
MARIO PINTO SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MARIO PINTO SpA filed Critical MARIO PINTO SpA
Priority to EP07425638A priority Critical patent/EP2047947A1/de
Publication of EP2047947A1 publication Critical patent/EP2047947A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/043—Accessories for spindle drives
    • B23Q5/045—Angle drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
    • B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles

Definitions

  • the present invention relates to a tool-holding gearbox for machine tools.
  • the tool is driven by a motor having its axis lying at right angles to the axis of rotation of the tool, via a bevel gearbox which is mounted on the turret of the machine tool.
  • the gearbox typically comprises a driving bevel gear, which is supported on bearings and is connected to the motor, which meshes with a driven bevel gear which is mounted on a tool-holding shaft and is also supported on bearings.
  • the temperature of the gearbox is considerably liable to rise, mainly during high speed machinings, e.g., up to 80-100 °C at a speed of 5000-6000 rpm, because of the friction of the rotating parts within the gearbox, in particular the bearings and the bevel gears.
  • This circumstance both affects the accuracy of the machining, because of the thermal distortions to which the parts inside and outside of the gearbox are subjected, and shortens the life of the gearbox, because the overheating of the rotating parts causes the latter to wear quickly.
  • a particular scope of the invention is to provide a gearbox in which the temperature substantially stabilizes, after an initial transient, on a low value which does not affect the machining accuracy and reduces the wearing.
  • a tool-holding gearbox 10 comprises a housing or box 11 attached to the tool-holding turret 12 of a general machine tool (not shown).
  • a driving shaft 20 is pivotally supported within tool-holding turret 12 on bearings 22, 24.
  • the end facing the gearbox of driving shaft 20 has a driving bevel gear 26 screwed thereto (which driving bevel gear, however, could also be made embloc).
  • the tool-holding turret has a coolant-feeding channel 27 extending from an inlet 28, which is formed on an upper surface of the turret, to a first outlet 30a and to a second outlet 30b, which are formed on respective opposite sides of the turret and to which respective nozzles would be directly connectable.
  • Driving bevel gear 26 meshes with a driven bevel gear 32 keyed to a chuck 33 having its axis lying at right angles to the axis of driving gear 20.
  • Chuck 33 is supported within box 11, on two pairs of bearings 34, 35 between which driven bevel gear 32 and a spacer 36 are sandwitched.
  • Chuck 33 consists of two coaxial parts interconnected by a bolt 33a, and bears two tool-holding seats 37, 38 at its respective opposite ends, which face respective, opposite open sides of the gearbox.
  • Tool-holding seats 37, 38 are surrounded by respective nuts 39, 40, which are screwed to the box for sandwitching the parts arranged therein, and are provided with lip seals 41, 42 which sealingly engage the outer surface of the tool-holding seats.
  • a cooling member is applied to each lateral side of gearbox 10.
  • Each cooling member consists of a flat block 44 made of aluminum, which has a rectangular profile with a main face 46 abutted against a respective lateral side of the box.
  • Main face 46 is provided with a depression 48 surrounded by a peripheral ledge 48a which contacts the wall of the box, and with a peripheral seal 49.
  • An opposite, main face 50 bears a plurality of cooling fins such as 52 which are made embloc.
  • Block 44 has an inlet port 54 near one of its longitudinal ends, which leads to depression 48 and is connected via a tube 56 to a respective one of outlets 30a or 30b of the tool-holding turret, as well as an outlet port 58 near the opposite longitudinal end, which has a nozzle 60 connected thereto.
  • Nozzle 60 points to the machining area of a respective one of the tools which are mountable at the opposite ends of chuck 33.
  • a gearbox 10 The operation of a gearbox 10 according to the invention is similar to the operation of a conventional gearbox, in which a driving shaft 20 drives a chuck 33 via a pair of bevel gears 26, 32.
  • the coolant is fed to outlets 30a, 30b via channels 27 in a conventionl way, but before being ejected from nozzles 60, it enters cooling member 44 through inlet ports 54 and is fed into the chamber defined between depression 48 and the wall of the box.
  • the cooling blocks make use of the coolant to cool the gearbox by convection, and dissipate the heat by means of cooling fins 52.
  • Figs. 5 to 7 show an alternative embodiment of the gearbox according to the invention, in which chuck 133 is provided, at one of its ends, with a sole tool-holding seat 138 facing a respective open side of the gearbox, the opposite side being closed by a cover 170. Also with this embodiment, both lateral sides of gearbox 110 have respective cooling members attached thereto, which are connected for receiving coolant from the turret and for delivering it by respective nozzles 160.
  • the cooling members receive the coolant from the same outlet 30b via a tee 131, the other outlet 30a being closed by a plug 157, and both nozzles 160 are pointed in such a way ass to deliver the coolant to the same side, i.e., towards the machining area of the sole tool mountable on the chuck.
  • the cooling members each consist of a flat block 144 made of aluminum and having a rectangular profile with a main face 146 abutted against a respective lateral side of the box. Main face 146 is provided with a depression 148 which is surrounded by a peripheral ledge 148a, and with a peripheral seal 149.
  • Block 144 has an inlet port 154 near its upper edge, which leads to depression 148 and is connected, via a tube 156, to outlet 30a of the tool-holding turret, as well as an outlet port 158 near its opposite edge, which has a respective nozzle 160 connected thereto.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
EP07425638A 2007-10-12 2007-10-12 Werkzeughaltendes Getriebe für Maschinenwerkzeuge Withdrawn EP2047947A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07425638A EP2047947A1 (de) 2007-10-12 2007-10-12 Werkzeughaltendes Getriebe für Maschinenwerkzeuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425638A EP2047947A1 (de) 2007-10-12 2007-10-12 Werkzeughaltendes Getriebe für Maschinenwerkzeuge

Publications (1)

Publication Number Publication Date
EP2047947A1 true EP2047947A1 (de) 2009-04-15

Family

ID=38984886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07425638A Withdrawn EP2047947A1 (de) 2007-10-12 2007-10-12 Werkzeughaltendes Getriebe für Maschinenwerkzeuge

Country Status (1)

Country Link
EP (1) EP2047947A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016020796A1 (en) * 2014-08-08 2016-02-11 M.T. S.R.L. Power skiving module
CN111906490A (zh) * 2020-07-29 2020-11-10 北京圣龙博睿科技有限公司 一种无限回转水冷夹紧机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1253361A (en) * 1968-04-18 1971-11-10 Prec Gear Machines & Tools Ltd Machine for chamfering or otherwise finishing the ends of teeth on gears or other toothed members
DE3447932A1 (de) * 1984-02-01 1985-09-12 Werkzeugmaschinenfabrik Adolf Waldrich Coburg Gmbh & Co, 8630 Coburg Vorsatzschnellaufgetriebe fuer bohr-, fraes- und dgl. werkzeugmaschinen
EP1693144A1 (de) * 2005-02-18 2006-08-23 MARIO PINTO S.p.A. Kegelräderanordnung mit polygonförmiger Querschnittprofilwelle, für Werkzeugrevolver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1253361A (en) * 1968-04-18 1971-11-10 Prec Gear Machines & Tools Ltd Machine for chamfering or otherwise finishing the ends of teeth on gears or other toothed members
DE3447932A1 (de) * 1984-02-01 1985-09-12 Werkzeugmaschinenfabrik Adolf Waldrich Coburg Gmbh & Co, 8630 Coburg Vorsatzschnellaufgetriebe fuer bohr-, fraes- und dgl. werkzeugmaschinen
EP1693144A1 (de) * 2005-02-18 2006-08-23 MARIO PINTO S.p.A. Kegelräderanordnung mit polygonförmiger Querschnittprofilwelle, für Werkzeugrevolver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016020796A1 (en) * 2014-08-08 2016-02-11 M.T. S.R.L. Power skiving module
CN111906490A (zh) * 2020-07-29 2020-11-10 北京圣龙博睿科技有限公司 一种无限回转水冷夹紧机构
CN111906490B (zh) * 2020-07-29 2022-09-16 北京圣龙博睿科技有限公司 一种无限回转水冷夹紧机构

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